Question: Should I Remove Old Shingles When Shingling?

Should you remove old shingles before installing new shingles?

While a repair job can often be more convenient and somewhat more cost-efficient, placing new shingles over old ones is never a good idea.

Whether repairing one section of roof, or a replacing a whole one, it’s always best to pull up the old shingles before putting down the new ones..

How do you prep a roof for shingles?

Roof Preparation Before Installing Roof ShinglesSecure the roof boards. If you are using the same roof boards without replacing them you really should check each and every one to make sure none of them need replacing. … Installing the drip edge. Install the drip edge around the eave ends of the roof. … Ice and water shield. … Adding the layer of felt.

What causes plywood to delaminate?

Too much or too little glue during manufacturing is a common cause of plywood delaminations. Other glue-related causes can trace back to bad glue used by the manufacturer. Glue can spoil, retain too much moisture or get contaminated, causing it to fail after you use the plywood.

Do you remove plastic strip on roof shingles?

More on the “no” answer to removing roof shingle cellophane strips. Asphalt roof shingle manufacturers recommend that installers leave that piece of cellophane in place. It does not need to be removed before, during, or after roof shingle installation. … It does not need to be removed as part of the roofing process.

Is OSB better than plywood for roofing?

Plywood Holds the Moisture Advantage Over OSB When plywood gets wet, it tends to swell. … OSB takes longer than plywood to get saturated, but also takes much longer to dry out. When used as roof sheathing, this tendency to hold moisture means it will degrade faster than plywood when exposed to chronic leaks.

Can you put a metal roof over shingles?

Metal roofs can be installed over your existing roof without tearing off shingles, provided local building codes allow it. … Make sure to consult local building codes before having a metal roof installed directly over old shingles. Some jurisdictions may require full tear-off whenever a new roof is installed.

Can you put asphalt shingles over wood shingles?

The only reason to install asphalt shingles over wood shingles or shakes is to save time and money. Sometimes this is done by homeowners who are unaware of roofing standards. Unfortunately, there are roofing contractors who should know better but who are willing to perform this kind of work.

How much does a 2000 sq ft roof cost?

A new asphalt shingles roof for a typical 2,000 sq. ft. single-story ranch house can range in price from $8,500 to $16,500 fully installed. Across the US, a typical architectural asphalt shingle roof will cost between $3.50 and $5.50 per sq.

Is it better to remove old shingles?

If any areas of the roof have become severely damaged, it’s usually better to remove the old shingles and start from scratch. … If you’re going to add a roof on top of an old one, it’s a good idea to remove any loose shingles and apply a new layer of 30-pound roofing felt before laying the new shingles.

What are the longest lasting roof shingles?

The longest-lasting shingles on the market are laminated shingles with a lifetime warranty and fall into two categories: dimensional shingles, which have a standard architectural shingle pattern) and “luxury” shingles, which do a better job of approximating the appearance of shakes or slate shingles.

Is re roofing a good idea?

If you are a homeowner with minor issues or leaks, which typically occur as the roof reaches the end of its lifespan, but the roof is in overall good shape, re-roofing may be for you. If you only have one layer of asphalt shingles on your roof, you may also be a good candidate for re-roofing.

Are there different grades of roofing shingles?

Different Grades, Different Levels Of Performance There are generally three grades of asphalt shingles that you can choose from. Roofing manufacturers and contractors typically refer to them as “good”, “better” and “best” products. The lower tier includes what’s known as “3-tab” shingles.

Are 50 year shingles worth the money?

In most cases, 50-year shingles won’t improve on resale value of a home over 25- or 30-year shingles. … Determining your needs and your budget is the first way to help you find an answer to the “are 50-year shingles worth the money” conundrum so many homeowners find themselves.

Is it OK to put a second layer of shingles on a roof?

However, adding a second layer of shingles to your roof will add to the total weight of the roof and make the roof too heavy for your home to support. The addition of another roof’s worth of weight can cause further roof problems, especially if you live in an area that receives a great deal of snow during winter.

How long does a reroof last?

Asphalt shingles last 15 to 30 years. Asphalt shingles, the most common type of roofing material sold today, are installed on more than 80 of new homes because they’re affordable (averaging $70 to $150 per square) and include warranties of up to 25 years.

What is the problem with more than two layers of shingles?

Long-Term Effects of Shingling Over Shingles That’s a lot of extra weight, putting added stress on the roof decking. Also, two layers of shingles are going to attract a lot more heat than just one layer, which can lead to the shingles prematurely deteriorating.

Can you put architectural shingles over 3 tab shingles?

As always, check with the manufacturer and your local building inspector about code requirements for roof work in your area. Some manufacturers don’t warranty their product if installed over existing shingles, and a new layer should never be installed over any more than a single layer of old three-tab shingles.

What are the worst roof shingles?

IKO shingles are bad at holding moisture and easily curl making your roof look bad and damaged even though you may have installed them recently. IKO shingles allow moisture to escape easier and so they crack and splinter in the heat much faster.

Can you put plywood over old shingles?

The new plywood will have to be nailed to the rafters or roof trusses. … But, with the old plywood left in place, it will be considerably more difficult to locate the rafters to ensure proper nail placement.

Why are multiple layers of shingles bad?

Having multiple layers of shingles is going to make your roof hotter because the heat gets trapped between the layers, which could mean premature aging of the shingles. This is especially true if you’ve overlayed your new shingles on top of warped shingles.